Adjustable fireplace super-fire back



June 25, 1929.

C. H. HANAWALT ADJUSTABLE FIREPLACE SUPER FIRE BACK Filed Nov. -28,192'7 0 5 7 ,F) a 9 7 INVENTOR,

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Patented June 25, 1929.

lllTE STATES CHARLES H. HANAWALT, OF BURBANK, CALIFORNIA.

ADJUSTABLE FIREPLACE SUPER-FIRE BACK.

Application filed November 28, 1927. Serial No. 236,170.

This invention relates to fire place structures and especially to asuper heating means for heating air in a closed back chamber having airinlet me: ns and air outlet n'icans which litter leads to a dischargeregister in any desired locatioin near or remote as to the fireplace.

An object is to provide a super-heater for utilizing much of the heatthat is lost by absorption into the usual lire-brick backs and toprovide a sectional. back which can be adjustably assembled inlire-place recesses of various widths.

Another object is to provide a lire back structure which will not in anyway choke up the lire line at the rim of the tire back, and an object isto so construct the tire back as to obtain an effective draft.

An important object is to provide a lire back which is composed ofseparate side wall and back panels of substantial material which may bemade at low cost and assembled when set in place without requirement ofexpert help and which is free of complex and numerous lines of joint.

There are other objects, advantages and features of construction,combination and details of means as will be made manifest in thefollowing specification of the herewith illustrative embodiment; itbeing tmderstood that modifications, variations and adaptations may beresorted to within the spirit scope and principle of the invention as itis more directly claimed hereinafter.

lli o ure 1. is a perspective of the lire-back.

l igure is a vertical section of a chimney and lire-place structure.

higu re 3 is a plan of the docking bed and its platform. v

Figure t is a detail section of a joined wing and panel parts.

l i nirc is a plan of ti 1 set up panel and side wings. and applied deckrods.

lhe tire box consists of a main ba 1k panel 2 of cast-iron having alower vertical portion and a forwardly inclined upper heat deflectingpart. The rear face of the panel has vertical and transverse,intersecting stiffening ribs 3-i-.

Along the lop. rear margin of the panel 2 is a shelf 5 and the bottomedge has a sealing web 6 adjacent to the floor ofthe fireplace. Thepanel 2 is plane or flat transversely from edge to edge.

To complete a fire box in front of the panel 2 i provide right and lefthand side wings 1-8 having vertical front edges 9 with scallug; webs 10and with rear abutment flanges ll whose faces conform to the angledfront face of the panel 2.

Since lire-places are not of uniform width my present invention providesfor the adjustment or setting or attaching of the wings 7-8 to ditlerentpositions against the panel necessary according to the width of theopening. Hence the wings are bolted at 1.2 to the face of the panel 2.

The win 7-8 are ribbed on the back and have top shclves 13.

When the wings and the panel have been set and bolted. in the recess anair chamber (l is formed at the rear of them and this is closed at thetop by a deck, which is supported by stilt rods having rear ends sunk inthe brick work ll and front ends resting on the shelves 5 13. On theserods is laid a sheet metal plate 16 upon which is tamped a bed of cement17 which effectually seals the top of the air chamber and provides aclear top vent or throat 'l for the chimney A.

The footing and the meeting edges of the panel 2 and the win as 7-8 arewell sealed in plaster to keep out lire gases and fresh air is let intothe chamber C by conduit 20 and out of the chamber by conduit 21 to anyplace of discharge desired.

l Vhat is claimed is:

1. A sectional air heater structure in combinatiou with a fireplace andchimney throat including a for ard! y pitched back panel and side wallwings abutted against and secured to the front of the panel a tire placeback wall, and a decking structure supported by the panel and wings andback wall; said panel and wings having; shelves and rods resting thereonand in the :[ireplace wall and said decking); including: a sheet metalplate laid on the rods and a cement bed on the sheet metal plate.

2. A fireplace structure comprising, in con'ibination. a chimneystructure forming a recess and its smoke throat outlet. an inner lirewall cons vding of a metal back and at tached side wings spaced from therecess back and sides to form a hot air chamber. said wings contactingwith the side walls at the front to close the front oi the chamber; anda top structure supported by the tops of the inner lire back wall andhaving supporting rods resting in the chimney wall at the sides and backof the recess.

3. A. sectional air heater structure in com.-

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having flanged rear, ve'rtie al edgee pomple 5 mental-y to the Verticalcontour of the back and fixedly secured te the ends iei the back,

at distances thereon determined by the Width of a given fire place inwhich the heater is to be mounted, and means forming a sealing topclosure for a hot air chamber formed betweenthe heater-wand. the backwall of the fire place.

CHARLES H. HANAW'ALT.

